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Torres. lets talk with this experimental vaccine in south africa. how hopeful should we be? >> actually, we should be very hopeful for this one because what that trial is doing, it is basically taking a vaccine trial that they did in 2009 in thailand, and that trial only had 30% effectiveness, meaning it only protected 30% of the people against hiv, so they said it wasnt effective enough, we cant release it to the public yet. lets get one that is better. so they piggybacked on thatten one, did m...